JP3440851B2 - Weft insertion method and device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a three-dimensional five-axis loom, and a weft insertion device for inserting a weft yarn made of reinforcing fibers such as untwisted carbon, aramid, and ceramic which are bundled with many thin filaments. It is about.

[0002]

2. Description of the Related Art A rapier type weft insertion device is used. In the rapier type weft insertion device, the rapier is inserted from one side of the weaving width, pulled out to one side, and reciprocates with a stroke corresponding to the weaving width. Therefore, the weft can be inserted by the rapier.

[0003]

However, it is not efficient to reciprocate the rapier with a stroke corresponding to the weave width. In particular, when the weaving width is large, the rapier must be reciprocally moved with a large stroke, which takes a long time, which causes a problem in increasing the speed of the loom.

The present invention has been made in a rapier type weft insertion device for the purpose of inserting wefts in a short time and significantly increasing the speed of a loom.

[0005]

According to the present invention, a pair of rapiers are inserted from both sides of the weaving width, a weft thread is inserted by one rapier, and the weft thread is received by the other rapier at the center position of the weaving width. Passed. After that, each rapier is pulled out to both sides of the weaving width, and the weft is pulled out by the other rapier. After that, the weft threads are folded back on both sides of the weaving width and inserted again.

Further, according to the present invention, the first rapier is combined with the second rapier, the loop end of the weft yarn is held by the first rapier, and the first rapier is inserted from one side of the weaving width to one side. Be withdrawn. The second rapier has a weft engaging member and is inserted from the other side of the weaving width and pulled out to the other side. Furthermore, a rapier guide mechanism is provided at the tip of the first or second rapier, and the first and second rapiers are guided by the rapier guide mechanism when the first and second rapiers come into contact with each other at the center position of the weaving width. , Both are relatively displaced. The direction is a direction that intersects the rapier insertion direction and a direction that intersects the loop surface of the weft. Therefore, the weft engaging member can be introduced into the loop of the weft.

In a preferred embodiment, when the first and second rapiers are separated from each other at the center position of the weaving width, the rapier guide mechanism guides the first and second rapiers so that the two are relatively displaced. The direction is a direction that intersects the rapier insertion direction and is parallel to the loop surface of the weft. Therefore, the loop end of the weft can be engaged with the weft engaging member.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

In FIG. 1, this is a weft insertion device for a three-dimensional five-axis loom, which is for inserting the weft yarn 1, in which a pair of rapiers 2 and 3 is inserted from both sides of the weaving width and one rapier 2 is inserted. The weft 1 is inserted by and the weft 1 is delivered to the other rapier 2 at the center position of the weaving width. After that, the rapiers 2 and 3 are pulled out to both sides of the weaving width, and the weft 1 is pulled out by the other rapier 3. afterwards,
The weft 1 is folded back on both sides of the weaving width and reinserted.
The weft yarn 1 is made of a reinforcing fiber such as carbon, aramid, or ceramic, is a bundle of many thin filaments, and is not twisted.

More specifically, in this apparatus, the weft 1 is supplied from a weft supply source 4, guided to an accumulator 5 and stored therein, which is guided to one rapier, that is, a first rapier 2, and a first rapier 2. The rapier 2 holds the loop end of the weft yarn 1. In this embodiment, a pair of rollers 6 are provided at the tip of the first rapier 2 and, as shown in FIG.
The rapier 2 has a pair of arms 7, the rollers 6 are arranged between the arms 7 and are rotatably supported, and the weft 1 is passed between the rollers 6. As a result, the loop end of the weft yarn 1 is held, the first rapier 2 is inserted from one side of the weaving width, and the weft yarn 1 is inserted by the first rapier 2. After that, the first rapier 2 is pulled out to one side of the weaving width.

The other rapier, that is, the second rapier 3, has a weft engaging member, and is inserted from the other side of the weaving width and pulled out to the other side. Therefore, when inserted, FIG.
As shown in, the first and second rapiers 2 and 3 contact each other at the center position of the weaving width. Further, in this embodiment, the same roller 8 as the roller 6 of the first rapier 2 is used as the weft engaging member of the second rapier 3,
The rapier 3 has a pair of arms 9 and 10, and the roller 8 is arranged between the arms 9 and 10, is attached to one arm 9, and is rotatably supported.

Further, a rapier guide mechanism is provided at the tips of the first or second rapiers 2 and 3, and when the first and second rapiers 2 and 3 come into contact with each other at the central position of the weaving width, the rapier guide mechanism is provided. First and second by mechanism
The rapiers 2 and 3 are guided and both are relatively displaced. That direction is the direction intersecting the rapier insertion direction, and the weft 1
It is the direction intersecting the loop surface of. In this embodiment, a cam member 11 is attached to one arm 9 at the tip of the second rapier 2. Furthermore, the other arm 10
A leaf spring is used for the front end 12 of the leaf spring and is bent outward. This constitutes a rapier guide mechanism, and when the first and second rapiers 2 and 3 contact each other, the first rapier 2 engages the cam member 11 and the bent end 12 of the arm 10 as shown in FIG. To meet. Furthermore, the first
As the second rapiers 2 and 3 advance, the cam member 1
The first and second rapiers 2 and 3 are guided by 1 and relatively displaced, and the first rapier 2 causes the arm 10 to move.
And the roller 8 is pushed open. The direction is a direction intersecting with the rapier insertion direction, and is a direction intersecting with the loop surface of the weft 1.

Further, as the first and second rapiers 2 and 3 advance, the first rapier 2 is pushed between the arm 10 and the roller 8, and the cam member 11 and the roller 8 pass over the tip of the first rapier 2. Further, when the tip of the first rapier 2 is crossed over, as shown in FIGS. 5 and 6, the elastic force of the arm 10 pulls the arm 9 and the roller 8 together, and the space between the arm 10 and the roller 8 is closed. The direction is a direction intersecting with the rapier insertion direction, and is a direction intersecting with the loop surface of the weft 1. Therefore, the roller 8 is introduced into the loop of the weft thread 1.

After that, at the center position of the weaving width, the first
And the second rapiers 2 and 3 are pulled apart from each other, the first rapier 2 is pulled out to one side of the weaving width, and the second rapier 3 is pulled out to the other side of the weaving width. The mechanism guides the first and second rapiers 2 and 3 so that they are relatively displaced. The direction is a direction intersecting the rapier insertion direction, and is a direction parallel to the loop surface of the weft 1. In this embodiment, at the tip of the first rapier 2, the cam surface 13 is formed on the arm 7 of the first rapier 2, which constitutes a rapier guide mechanism, and the first and second rapiers 2 and 3 are mutually connected. When separated, the cam surface 13 engages with the roller 8 of the second rapier 3, the roller 8 pushes up the first rapier 2, and the first and second rapiers 2 and 3 are relatively displaced.
The direction is a direction intersecting the rapier insertion direction, and is a direction parallel to the loop surface of the weft 1. Therefore, as shown in FIG. 7, the loop end of the weft 1 is engaged with the roller 8.

Therefore, at the central position of the weaving width,
The weft 1 is delivered to the second rapier 3. After that, as shown in FIGS. 8, 9 and 10, when the first rapier 2 is drawn out to one side of the weaving width and the second rapier 3 is drawn out to the other side of the weaving width, the weft yarn is drawn by the second rapier 3 1 is pulled out. After that, the weft 1 is folded back on both sides of the weaving width, and as shown in FIG. 11, the first and second rapiers 2 and 3 are inserted again, and the weft 1 is inserted again.

Therefore, in the case of this device, each rapier 2, 3 may be reciprocally moved with a stroke of half the weaving width, whereby the weft 1 can be inserted, and the required time is short. As a result, the weft 1 can be inserted in a short time, and the loom can be sped up significantly.

Further, the weft yarn 1 can be folded back on both sides of the weaving width and inserted again, there is no need to cut the weft yarn, and the continuous weft yarn 1 can be woven into a woven fabric. Therefore, a large tension can be applied to the weft yarn 1 to give the woven fabric a large strength.

Further, when the weft 1 is delivered to the second rapier 3, the roller 8 is introduced into the loop of the weft 1, and the roller 8 is engaged with the loop end of the weft 1. Therefore, even if the weft 1 is a bundle of a large number of thin filaments, it can be reliably and accurately inserted.

[0019]

As described above, according to the present invention, the weft thread can be inserted in a short time, and the loom speed can be greatly increased. It is also possible to give a large tension to the weft and give the woven fabric great strength. Furthermore, even a weft yarn in which a large number of thin filaments are bundled can be reliably and accurately inserted, and the intended purpose can be achieved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view of the rapier of FIG.

FIG. 3 is a side view showing a state where the rapier of FIG. 1 is in contact.

FIG. 4 is a plan view of the rapier of FIG.

FIG. 5 is a side view showing the next step of FIG.

FIG. 6 is a plan view of the rapier of FIG.

FIG. 7 is a side view showing the next step of FIG.

FIG. 8 is a side view showing the next step of FIG. 7.

FIG. 9 is a side view showing the next step of FIG.

10 is a plan view of the rapier of FIG. 9. FIG.

FIG. 11 is a side view showing the next step of FIG.

[Explanation of symbols]

1 weft 2 first rapier 3 second rapier 6,8 roller 11 Cam member 13 Cam surface

Claims (3)

(57) [Claims] 1. A weft insertion device for inserting a weft made of reinforced fiber such as carbon, wherein first and second rapiers each having a roller are inserted from both sides of the weaving width, and the weft is driven by the rollers of the first rapier. And guiding the first and second rapiers by a rapier guide mechanism provided at the tip of the first or second rapier when the first and second rapiers come into contact with each other at the center position of the weaving width. A roller of the second rapier is introduced into the loop of the weft thread, and the weft thread is transferred to the second rapier;
When the first and second rapiers are separated from each other, the first and second rapiers are guided by the rapier guide mechanism, the rollers of the second rapier are engaged with the loop ends of the weft yarns, and the first and second rapiers are engaged. Is pulled out to both sides of the weaving width, and the weft yarn is pulled out by the roller of the second rapier. 2. When the first and second rapiers come into contact with each other at the center position of the weaving width, the rapier guide mechanism guides the first and second rapiers so that they are relatively positioned in the rapier insertion direction. 2. The weft insertion device according to claim 1, wherein the weft insertion device intersects with the weft and is displaced in a direction intersecting the weft loop surface so that the roller of the second rapier is introduced into the weft loop. 3. The first portion at the central position of the weaving width
When the second rapier and the second rapier are separated from each other, the rapier guide mechanism guides the first and second rapiers and relatively displaces them in the direction parallel to the rapier insertion direction and in the direction parallel to the loop surface of the weft. The weft insertion device according to claim 2, wherein the loop end of the weft is engaged with the roller of the second rapier.